@article{https://doi.org/10.6102%2Fzis185,
doi = {10.6102%2Fzis185},
url = {http://zis.gesis.org/DoiId/10.6102%2Fzis185},
author = {Kemper%2C C. J.%2C Beierlein%2C C.%2C Kovaleva%2C A.%2C %26 Rammstedt%2C B.},
language = {deu},
title = {Skala Optimismus-Pessimismus-2 %28SOP2%29},
journal = {Zusammenstellung sozialwissenschaftlicher Items und Skalen (ZIS)},
publisher = {ZIS - GESIS Leibniz Institute for the Social Sciences},
year = {2014}
}